Method for removing scale incrustations, oil and the like in water receptacles



Patented July 11, 1933 UNITED STATES PATENT OFFICE HUMBERT IBIZZON'I, OFNEW YORK, AND PHILIP LENT, OF BROOKLYN, NEW YORK METHOD FOR REMOVINGSCALE INCRUSTATIONS, OIL AND THE LIKE IN WATER REGEPTACLES No Drawing.

This invention relates to the composition and method for removing scaleincrustations, oil and the like in water receptacles, such as boilers,automobile radiators and the like. In

water receptacles where the drain or outlet is located at a point abovethe bottom of the receptacle, it is of importance to provide for thecomplete draining of the water receptacle with the dissolved scaleincrustations and the )i1 without permitting any of the latter to settlein the bottom of the container.

One of the objects of this invention therefore and a dominant featurethereof, is the provision of a method whereby dissolved oil and otherimpurities in a liquid receptacle may be brought to any level in thereceptacle, at which level it may be drained oif.

A further object of the invention is to provide a composition and methodof the character described, which shall be highly eflicient andeflective and shall work equally well with cold or heated water in thereceptacle treated.

Other objects and advantages of the invention will in part be obviousand in part pointed out.

Our invention will be understood from the following example and itsapplication to the cleansing of a boiler. The latter usually has acertain amount of oil floating on the surface of the water while theinner Wall thereof may become incrustated with iron oxide or other scaleformations formed thereon, all of which lll'lltSG the efficiency andprevent the proper joperation of the boiler. To remove these, we firstpour into the boiler an oil solvent having a density greater than thanWater, such for example, as trichlorethylene. The latter descends to thebottom of the boiler carrying with it such portions of the oil as havebecome dissolved by contact with the solvent. We then add a salt capableof attacking or dissolving the rust or incrustations as for example,sodium peroxide. A sufiicient amount is employed to elfectively dissolveor loosen the rust, or incrustations or other impurities, some of which,such as iron oxide, will float to the surface of the liquid and some ofwhich will drop to the bottom, from where it may be removed, as forinstance in case of an auto- Application filed April 11,

1930. Serial No. 443,609.

mobile radiator having a drain opening at the bottom of the radiator.

We then introduce into the container, a water soluble salt such aspotassium carbon ate which is capable of increasing the specific gravityof the water, thus causing the trichlorethylene to rise to the surface,thereby dissolving the undissolved substances adhering to the watercontainer or still floating upon the surface of the Water. The resultantliquid holds dissolved therein, the rust incrustations and the oil.

We then add water to decrease the density of the liquid, below thedensity of the dissolved oil, thereby causing the trichlorethylene andthe dissolved oil which is of greater density to descend again. Byregulating the amount of water thus added, the point to which the oilsolvent and oil descends, may thus be controlled and the dissolvedsubstances may then be drained off at the desired point in thereceptacle. I Where the draining oif at a level above the bottom of thereceptacle is not important as for example, in cleaning automobileradiators where the outlet is at the bottom, the steps of the additionof the potassium carbonate and water may be omitted, the introduction ofthe oil solvent and soluble salt for attacking the rust orincrustations, being suffieient. As the reaction takes place between thewater and the sodium peroxide, the liquid is stirred up and a completecleansing circulation established thru the radiator core and after thereaction has subsided, the water with the dissolved oil and otherimpurities therein may be readily drained ofi.

While We have referred to triohlorethylene as the preferred oil solvent,it Will be understood of course, that other oil solvents heavier thanwater may be employed. Trichlorethylene however, is preferable becauseit is not inflammable and obviously where sodium peroxide is employed,an oil solvent should be of non-inflammable character. Likewise,metallic sodium or metallic potassium or other oxides of sodium andpotassium or any other water soluble substances capable of attacking ordissolving rusts or in'crusta- 10m tions may be employed instead ofsodium peroxide.

It will also be understood that instead of potassium carbonate, anyother water soluble 5 salts of potassium or sodium capable of increasingthe specific gravity of the water, may be employed.

Our method and compound have the further advantage that they may beemployed effectively both with cold and heated Water. This is ofparticular importance in cleaning automobile radiators since it is notnecessary to run the motor and circulate the water so as to becomeheated.

It will thus be seen that there is provided a material and process inwhich the several objects of this invention are achieved, and which iswell adapted to meet the conditions of practical use.

As various possible embodiments might b made of the above invention, andas various changes might be made in the embodiment set forth, it is tobe understood that all matter herein set forth is to be interpreted asillustrative and not in a limiting sense.

Having thus described our invention, We claim as new and desire tosecure by Letters Patent:

1. A process for removing oil from a water receptacle having watertherein and oil on the surface of the water consisting in introducinginto the water at the surface thereof, a non-inflammable oil solvent ofgreater density than Water and non-soluble in Water to dissolve the oiland descend to the bottom of the receptacle, then introducing into thewater a Water soluble salt of greater density than water to formtherewith a liquid having a density greater than the density of thedissolved substances and thereby causing the latter to rise in theliquid.

2. A process for removing oil from a Water receptacle having Watertherein and oil on the surface of the water consisting in introducinginto the water at the surface thereof, a noninflammable oil solvent ofgreater density than water to dissolve the oil and descend to the bottomof the receptacle, then introducing into the Water a Water soluble saltof greater density than water to form therewith a liquid having adensity greater than the density of the dissolved substances and therebycausing the latter to rise in the liquid, and then adding water to theliquid to reduce the density of the liquid and cause the dissolvedsubstances to again descend in the liquid.

3. A process for removing oil and incrustations such as rust and scalefrom a water receptacle having water therein and oil on the surface ofthe Water consisting in introducing into the water at the surfacethereof, a non-inflammable oil solvent having a greater density thanwater-and non-soluble in water to dissolve the oil and descend to thehottom of the receptacle, and then introducing into the water a solventcomprising one or more of the following group: metallic sodium andpotassium and the oxides thereof to dissolve said incrustations..

4. A process for removing oil and incrustations such as rust and scaleand the like impurities from a water receptacle having water therein andoil on the surface of the water consisting in introducing into theWater, a non-inflammable oil solvent greater in density than water andnon-soluble in water to dissolve the oil and descend to the bottom ofthe receptacle, then introducing into the water a solvent comprising oneor more of the following group metallic sodium and potassium and theoxides thereof to dissolve said incrustations, then introducing to thewater a water soluble salt of greater density than water, to formtherewith a liquid having a density greater than the density of thedissolved substances and thereby causing the latter to rise to the topof the liquid and permitting the oil solvent within the liquid todissolve oil adhering to the wall of the receptacle.

5. A process for removing oil and incrustations and other impuritiesfrom a water receptacle having water therein and oil on the surface ofthe water consisting in introducin into the water receptacle,trichlorethylene to permit the same to partially dissolve the oil as itcomes in contact therewith and descends to the bottom of the receptacle,then introducing sodium peroxide for attacking or dissolving suchincrustations, then introducing potassium carbonate for increasing thedensity of the liquid abovethe density of the oil solvent and dissolvedoil, and therebycausing the latter to rise to the top of such liquid andpermitting the oil solvent to dissolve '105 the oil adhering to the wallof the receptacle and floating on the surface, then adding water todecrease the density of the liquid below that of the oil solvent anddissolved oil to cause the latter to descend to a desired level in thereceptacle and then draining the liquid ofl at such a level.

6. A process for removing oil from a water receptacle having watertherein and oil on the surface of the water, consisting in introducinginto the Water receptacle trichlorethylene to permit the same topartially dissolve the oil as it comes in contact therewith and descendto the bottom of the receptacle, then introducing potassium carbonateinto the receptacle for increasing the density of the liquid above thedensity of the oil solvent and dissolved oil, and thereby causing thelatter to rise to the top of the liquid and permitting the oil solventto dissolve the 2 oil adhering to the wall of the receptacle andfloating on the surface of the liquid.

7 A process for removing oil and incrusta-' tions and other impuritiesfrom a Water receptacle having water therein and oil on the i surface ofthe water, consisting in introducing into the water receptacletrichlorethylene to permit the same to partially dissolve the oil as itcomes in contact therewith and descend to the bottom of the receptacle,then introducing sodium peroxide into the liquid for attacking ordissolving the incrustations, then introducing potassium carbonate forincreasing the density of the liquid above the density of the oilsolvent and dissolved oil, and thereby causing the latter to rise to thetop of the liquid and permitting the oil solvent to dissolve the oiladhering to the wall of the receptacle and floating on the surface.

8. A process for removing oil from a water receptacle having watertherein and oil on the surface of the water, consisting in introducingintothe water receptacle trichlorethylene to permit the same topartially dis-v solve the oil as it comes in contact therewith anddescend to the bottom of the receptacle, then introducing potassiumcarbonate into the receptacle for increasing the density of the liquidabove the density of the oil solvent and dissolved oil, and therebycausing the latter to rise to the top of the liquid and ,permitting theoil solvent to dissolve the oil adhering to the wall of the receptacleand floating on the surface of the liquid,thenadding water to decreasethe density of the liquid below that of the oil solvent and dissolvedoil to cause the latter to descend in the receptacle.

In testimony whereof we aflix our signatures. v

' HUMBERT BIZZONI.

PHILIP LENT.

